Commit f8ee34a9 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
Browse files

lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15 



Lightnvm was an innovative idea to expose more low-level control over SSDs.
But it failed to get properly standardized and remains a non-standarized
extension to NVMe that requires vendor specific quirks for a few now mostly
obsolete SSD devices.  The standardized ZNS command set for NVMe has take
over a lot of the approaches and allows for fully standardized operation.

Remove the Linux code to support open channel SSDs as the few production
deployments of the above mentioned SSDs are using userspace driver stacks
instead of the fairly limited Linux support.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJavier González <javier@javigon.com>
Signed-off-by: default avatarMatias Bjørling <mb@lightnvm.io>
Link: https://lore.kernel.org/r/20210413105257.159260-5-matias.bjorling@wdc.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 655cdafd

drivers/lightnvm/Kconfig

+3 −1
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ 
#



menuconfig NVM

	bool "Open-Channel SSD target support"

	bool "Open-Channel SSD target support (DEPRECATED)"

	depends on BLOCK

	help

	  Say Y here to get to enable Open-channel SSDs.
@@ -15,6 +15,8 @@ menuconfig NVM 
	  If you say N, all options in this submenu will be skipped and disabled

	  only do this if you know what you are doing.



	  This code is deprecated and will be removed in Linux 5.15.



if NVM



config NVM_PBLK

drivers/lightnvm/core.c

+2 −0
Original line number Diff line number Diff line
@@ -1174,6 +1174,8 @@ int nvm_register(struct nvm_dev *dev) 
{

	int ret, exp_pool_size;



	pr_warn_once("lightnvm support is deprecated and will be removed in Linux 5.15.\n");



	if (!dev->q || !dev->ops) {

		kref_put(&dev->ref, nvm_free);

		return -EINVAL;